Slug



July 28, 1942. D. c. ADDICKS SLUG Filed Aug. 1, 1940 Patented July 28, 1942 SLUG Diedrich C. Addicks, Rome, Gat; Mary U. Addicks administratrix of said Diedrich C. Addicks, de-

ceased Application August 1, 1940, Serial No. 349,208

1 Claim.

This invention relates to a slug for. cutting out clinker rings and has relation more particularly to a slug for cutting out the rings which form within a cement kiln.

In burning cement in rotary kilns it quite often occurs that the mixture will gather in a certain place along the kiln and burn fast resulting in the formation around the kiln of what is known as a ring. If not removed this ring in time will stop production. As this ring is very hard it is important that a suitable projectile be forcibly thrown thereagainst. It is a purpose of the present invention to provide such a projecticle or slug which can be shot from a gun and caused to strike the ring at a high velocity. It is also an object of the invention to provide a projectile or slug which can be employed to advantage in cutting or breaking a clinker ring within a cement kiln but which will not injure the brick structure of the kiln.

The novel features of my invention will hereinafter be definitely claimed.

In order that my invention may be the better understood, I will now proceed to describe the same with reference to the accompanying drawing, wherein:

Figure l is a view in front elevation of a slug or projectile constructed in accordance with an embodiment of my invention;

Figure 2 is a view in side elevation of the device as herein comprised, the flare of the head resulting from impact with a kiln ring being indicated by broken lines;

Figure 3 is a sectional view taken substantially on the line 3-3 of Figure 2;

Figure 4 is a sectional view taken substantially on the line 4-4 of Figure 1;

Figure 5 is an elevational View illustrating a condition of the projectile or slug after striking the brick structure of a kiln.

As disclosed in the accompanying drawing, my improved projectile or slug comprises a cylindrical member I of hard steel and of desired length as may be determined by the bore of the gun with which it is to be employed. The forward end of the member I has integrally formed therewith a head 2 of a diameter to properly engage within the bore of a gun. This head 2 is normally cylindrical and is of a diameter greater than the diameter of the member I whereby the forward end of the body or member I at its junction with the head 2 is defined by an inwardly facing shoulder 3. Surrounding the member I from said shoulder 3 to the rear end of the member I is a sleeve 4 of lead. The wall of this sleeve 4, as is clearly illustrated in Figures 3 and 4 of the drawing, is of a thickness to have the peripheral surface a disposed slightly beyond the normal cylindrical periphery b of the head 2. This periphery a of the sleeve 4 has close contact with the wall of the bore of the gun from which the slug or projectile is discharged and also has effective coaction with the rifling of the bore.

The head 2 has disposed therethrough at its axial center a bore 5 of a considerable diameter with the outer portion of the wall of such bore 5 outwardly tapered or bevelled, as at 6. The head 2 has cut therethrough preferably at equidistantly spaced points circumferentially therearound the slots 1 which divide the head into a series of cutting sections or members 8.

The improved projectile or slug as herein disclosed is to be shot from a suitable gun with the hot clinker ring within a cement kiln or the like as the target. The impact of the slug or projectile upon such ring will expand the head 2 by causing the cutting members 8 to bend outwardly (as indicated by broken lines in Figure 2) but such head 2 will not mushroom in the generally accepted meaning. The outer ends 0 of the members 8 serve as chisels to cut or gouge out the hot ring so that by continued shooting at the ring the same will be effectively broken up. This destruction of the ring by the use of my improved projectile or slug can be readily eifected without shutting down production.

In a slug or projectile such as the one herein comprised, it is important that it be of a character not to unduly damage the brick structure of the cement kiln should the same strike such brick structure.

The slug or projectile as illustrated in the accompanying drawing is on a scale materially larger than the size in actual use.

The slots 1 result in a structure wherein the points of juncture between the members 8 and the adjacent end of the member I are the weakest parts of the slug or projectile and this weakening is further insured by having the bore 5 of the head 2 extend slightly within said adjacent end of the member I, as indicated at 9. These weakened parts or portions Ill facilitate the flaring of the head 2 upon firing impact upon the ring within the kiln. In the event, however, the slug or projectile should strike the brick structure of the kiln, these weakened parts or portions I0 will result in considerable spreading of such members 8, or breaking off, the latter condition being illustrated in Figure 5 of the drawing. This tendency of the members 8 to break off or to spread minimizes the damage resulting from the impact of the slug or projectile upon the brick structure.

It is also to be stated that the lead sleeve 4 serves to give added weight to the slug or projectile and particularly to the rear of the head 2 whereby the effectiveness of the slug or projectile is materially increased when striking the ring within the kiln.

It is particularly advantageous to discharge the slug as herein disclosed from a rifle so that the slug when it strikes the ring within the kiln will be rotating at a very rapid rate. This rotary movement of the slug at the time of impact, plus the force of the impact, results in effective breaking down of the ring. The extended peripheral surface a of the lead sleeve 4 assures the eifective engagement of the slug with the rifiing of the bore of the gun.

I claim:

As a new article of manufacture, a slug to be fired from a gun to break down a ring formed within a cement kiln during the burning of the cement, said slug comprising an elongated member having a head at one end, said head being provided therethrough with a bore, the outer portions of the wall of the bore of the head being outwardly flared, said head being slotted at points circumferentially spaced therearound to divide the head into cutting members, the bore through the head extending within the adjacent portion of the member, the elongated member being of a diameter less than the normal diameter of the head, and a sleeve of soft metal surrounding the member from the head to the outer end of the member, the periphery of said sleeve being outwardly disposed with respect to the normal periphery of the head, the portion of the bore extending within said adjacent portion of the member weakening the slug at the junction of the head and member so that the cutting members will fracture at such weakened points, the sleeve of soft metal giving added weight to the slug rearwardly of the head to increase the impact efiiciency of the slug.

DIEDRICH C. ADDICKS. 

